Amidst the chaos, migrants can be heard cheering, “Gracias, Mexico!” after the country did nothing to stop the illegal aliens from passing through the country and towards the U.S.

Meanwhile, the Border Patrol says the San is Ysidro port is “at capacity” and unable to process any additional migrants seeking entry into America. Via Arizona Republic reporter Daniel Gonzalez:

A caravan organizer blamed President Trump. President Donald Trump says the caravan is a threat to the safety of the US. He has asked states bordering Mexico to send troops to shore up security until his proposed border wall is built. The US has a legal obligation to hear asylum claims but the majority of claimants from Central America lose their cases.

The caravan set off for the US on 25 March in southern Mexico, near the Guatemala border and at one point numbered more than 1,000 people. The group traveled by bus, train and on foot during its 2,000-mile (3,200km) trek to the US border, with many saying they were fleeing persecution and violence in their home countries

The group has been a frequent target for the US president, who has argued in his tweets that it showed the need to tighten immigration laws. One of the group’s organisers, Alex Mensing, told the BBC that no-one in the group had been processed by the US Customs and Border Patrol (CBP) at the San Ysidro crossing. Some of the members were allowed to cross a long bridge that led to US processing buildings but had to stop outside. In a statement, CBP Commissioner Kevin McAleenan said that “we have reached capacity at the San Ysidro port of entry”.

Under US immigration law, inspectors have the power to quickly deport individuals who do not have the proper travel or visa documents at the time that they request entry or if the inspector believes that the person requesting entry has committed fraud or misrepresented the truth. However, if an individual expresses a fear of return to his or her home country, they will not be immediately deported but instead be detained until they undergo a “credible fear interview”.

The aim of the interview is for the asylum officer to try to establish if the asylum request is based on a fear of persecution based on race, religion, nationality, political beliefs or membership of a particular group. If the officer finds that the individual has a chance of proving fear of persecution, the applicant is referred to a judge.

Ms Ramos said the caravan organisers were only sending people who they thought would pass the credible-fear interviews.